difference$

Obtain entries not present in another object.

Alternatives: difference, difference$.
Similar: isDisjoint, union, intersection, difference, symmetricDifference.

function difference$(x, y)
// x: an object (updated)
// y: another object

const object = require('extra-object');

var x = {a: 1, b: 2, c: 3, d: 4, e: 5};
var y = {b: 2, d: 4};
object.difference$(x, y);
// → { a: 1, c: 3, e: 5 }

x;
// → { a: 1, c: 3, e: 5 }

var x = {a: 1, b: 2, c: 3, d: 4, e: 5};
var y = {b: -2, d: -4};
object.difference$(x, y);
// → { a: 1, c: 3, e: 5 }

References

• Data.List.\: Haskell
• Data.Set.difference: Haskell
• Set.difference: Python
• _.difference: lodash
• _.differenceBy: lodash
• _.differenceWith: lodash
• Array.remove: sugarjs